I have an existing infrastructure of 2 Linux Servers to provide HTTP,
POP3, SMTP, LDAP (for address books, and authentication), DNS (primary,
secondary), FTP, and SSH.

My questions are:

Would I be able to provide iFolder with little change in my existing
setup to offer multi-domain authentication through LDAP (would I be
required to use E-Directory + LDAP)

Would I be required to use Novell specific file system formats or can I
stick with a directory on my server ext3 file system?

Reason for all this needing to fit into my existing infrastructure would
be for cost of new software and to ensure my existing data and setup
will not suffer or have to be drastically changed to implement this feature.

Thank you all for your time and thoughts.